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Color quench correction for low level Cherenkov counting.

S Tsroya1, O Pelled, U German

  • 1Nuclear Research Center Negev, P.O.B. 9001, 84190 Beer Sheva, Israel.

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
|March 3, 2009
PubMed
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Accurate Cherenkov counting requires correcting for color quenching. This study developed a new method using an external Europium-152 source to create correction curves, improving low-level counting accuracy.

Area of Science:

  • Nuclear Chemistry
  • Radiochemistry
  • Analytical Chemistry

Background:

  • Cherenkov counting efficiency is significantly impacted by color quenching.
  • Accurate quantification in liquid scintillation counting (LSC) necessitates effective quench correction.
  • Existing spectral indicators may not be suitable for all low-level Cherenkov counting applications.

Purpose of the Study:

  • To develop and validate a novel method for color quench correction in Cherenkov counting.
  • To establish a correction curve for aqueous samples containing Strontium-90/Yttrium-90 ((90)Sr/(90)Y).
  • To demonstrate the utility of the developed method for low-level Cherenkov counting.

Main Methods:

  • Utilized the external (152)Eu source of a Quantulus 1220 LSC system.

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  • Determined a quench indicative parameter based on the spectra area ratio.
  • Constructed a color quench correction curve specifically for (90)Sr/(90)Y in aqueous samples.

    • Main Results:

    • Successfully generated a quench indicative parameter using the (152)Eu external source.
    • Developed a reliable color quench correction curve applicable to (90)Sr/(90)Y samples.
    • The proposed method proved effective for low-level Cherenkov counting, outperforming common spectral indicators.

    Conclusions:

    • The external source method provides an effective means to correct for color quenching in Cherenkov counting.
    • This approach offers a valuable tool for accurate low-level radioactivity measurements.
    • The developed correction curves enhance the reliability of LSC results, particularly for challenging sample matrices.